n=81xˉ=23s=3.6H0:μ=25H1:μ<25
Test-statistic
t=s/nxˉ−μt=3.6/8123−25=0.4333−2=−1.566α=0.01df=n−1=81−1=80
One-tailed test
tcrit=2.373
Reject the null hypothesis if t≤−tcrit
t=−1.566>tcrit=−2.373
We accept the null hypothesis at 0.01 level of significance.
Comments
Leave a comment